A followup urinalysis helps to confirm that the urinary tract is infection-free. It is important to take the full course of treatment because symptoms may disappear before the infection is fully cleared. Adults: The usual adult dosage in the treatment of urinary tract infections is 1 BACTRIM DS (double strength) tablet or 2 BACTRIM tablets every 12 hours for 10 to 14 days. An identical daily dosage is used for 5 days in the treatment of shigellosis. We’ve provided information on how chronic urinary tract infection can begin, why you can’t rely on standard UTI testing, and recurrent UTI treatment options, among other topics. We’ll continue to expand our site, and we’d also love to hear from you. Mar 8, 2018. A urinary tract infection that travels to your kidneys can be dangerous. Seek prompt medical treatment if you develop signs and symptoms. Yes, Bactrim will help a urinary tract infection (UTI). It is an antibiotic that is commonly prescribed specifically for UTIs. However, it will only be completely effective if the entire. Bactrim is used to treat ear infections, urinary tract infections, bronchitis, traveler's diarrhea, shigellosis, and Pneumocystis jiroveci pneumonia. Bactrim may also be used for purposes not listed in this medication guide. Includes Bactrim side effects, interactions and indications The recommended Bactrim dosage for treating a urinary tract infection is one double-strength or two regular-strength tablets every 12 hours for 10 to 14 days What is a urinary tract infection (UTI)? It disrupts the production of dihydrofolic acid while trimethoprim disrupts the production of tetrahydrofolic acid Treatment for UTI. Although the incidence of urinary tract infection has not changed substantially over the last 10 years, the diagnostic criteria, bacterial resistance patterns, and recommended treatment have. A urinary tract infection (UTI) starts when bacteria get into your bladder, kidneys, or another part of your urinary tract. The best way to treat a UTI -- and to relieve symptoms like pain. Treatment. Antibiotics usually are the first line treatment for urinary tract infections. Which drugs are prescribed and for how long depend on your health condition and the type of bacteria found in your urine.